Flow Field and Structure of Swirl Stabilized Non-Premixed Natural Gas Flames at Elevated Pressure

Janus, Bertram; Dreizler, Andreas; Janicka, J.

doi:10.1115/gt2004-53340

Cited by 7 publications

(18 citation statements)

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“…This configuration, which features a single real industrial fuel injector nozzle operated at near-realistic aero-engine conditions, is investigated in house by means of advanced laser-based measuring techniques. These measurements already reported in Janus et al [13,14] have revealed the presence of a PVC for both isothermal and reacting conditions in this model combustor. Measurements by Midgley et al [22] on the same swirler nozzle in a water rig have also shown the existence of a PVC and will also be used as a reference for the present study.…”

supporting

confidence: 60%

“…The generic combustor considered resembles a segment of a gas turbine combustion chamber which has been studied in house by Janus et al [13,14] by means of laser Doppler velocimetry (LDV) velocity measurements and tracer-and OH-planar induced fluorescence (PLIF) for isothermal and reacting conditions, respectively. The nozzle is based on a generic design by TURBOMECA and consists of a central round jet of natural gas surrounded by swirled, preheated combustion air.…”

Section: Configuration and Numerical Setupmentioning

confidence: 99%

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Study of Flow and Mixing in a Generic GT Combustor Using LES

Wegner

Staufer

Sadiki

et al. 2007

Flow Turbulence Combust

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While the basic capability of large eddy simulation (LES) has been amply demonstrated on a number of relatively simple academic configurations, there is still a lack of works applying LES to practical systems also performing detailed quantitative comparisons based on experimental data. In this paper, we tend to approach the simulation of real gas turbine combustor step by step as we first present results of the isothermal LES of a generic gas turbine combustor rig. The available detailed measurements are used to thoroughly validate the LES results. Beyond a pure validation, the LES is used to analyze the influence of the precessing vortex core present in the studied configuration on the mixing of fuel and oxidizer, and possible implications for reacting conditions are discussed.

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supporting

confidence: 60%

Section: Configuration and Numerical Setupmentioning

confidence: 99%

Study of Flow and Mixing in a Generic GT Combustor Using LES

Wegner

Staufer

Sadiki

et al. 2007

Flow Turbulence Combust

Self Cite

View full text Add to dashboard Cite

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“…The PVC is known to be weakly dependent of Re and its frequency f can be expressed in terms of a Strouhal number, fDe/U 0 where De stands for the swirler exit diameter [228]. Evaluations of the LES issued PVC's [239,240] and their Strouhal numbers for the cold flow configuration of Fig. 5(a) [238,254,255], results are very satisfactory (cf.…”

Section: Predictions Of the Unsteadiness Of Swirl Flow Featuresmentioning

confidence: 96%

Large Eddy Simulations of gaseous flames in gas turbine combustion chambers

Gicquel

Staffelbach

Poinsot

2012

Progress in Energy and Combustion Science

407

183

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“…Each recorded frame was corrected for laser energy fluctuations and OH-absorbtion using fast responding photo diodes. Details are given in [30].…”

Section: Planar Laser-induced Fluorescence Of Ohmentioning

confidence: 99%

Experimental Study on Stabilization of Lifted Swirl Flames in a Model GT Combustor

Janus

Dreizler

Janicka

2005

Flow Turbulence Combust

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This study reports on experimental investigations on isothermal and reacting swirled nonpremixed flows under varying pressure conditions. In this configuration, a central high speed fuel jet was surrounded by a heated swirling air flow. For the reacting case natural gas served as fuel whereas for isothermal conditions fuel was replaced by a mixture of helium and air to achieve Reynoldssimilarity. The optically accessible combustor allowed for application of laser diagnostics. Here we report on Laser Doppler Anemometry and planar laser-induced fluorescence (PLIF) experiments used to characterize the flow field and visualize selected scalars, respectively. Acetone served as a fluorescence marker for mixture fraction investigations. The hydroxyl radical was used to provide general features of the reaction zone such as flame shape and mean stabilization. To expose the influence of pressure on the flame structure three different operating points were investigated varying the combustor pressure between 2 and 6 bar while the inflow bulk velocities remained the same. Striking features of the present configuration are a detached flame, multiple recirculation zones, and complex coherent flow structures.

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Flow Field and Structure of Swirl Stabilized Non-Premixed Natural Gas Flames at Elevated Pressure

Cited by 7 publications

References 0 publications

Study of Flow and Mixing in a Generic GT Combustor Using LES

Study of Flow and Mixing in a Generic GT Combustor Using LES

Large Eddy Simulations of gaseous flames in gas turbine combustion chambers

Experimental Study on Stabilization of Lifted Swirl Flames in a Model GT Combustor

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